PLT-7639: Batch delete methods for data retention. (#7444)

14 files changed, 332 insertions, 0 deletions

diff --git a/i18n/en.json b/i18n/en.json
index 2c8bbd27b..94b6bd298 100644
--- a/i18n/en.json
+++ b/i18n/en.json
@@ -5264,6 +5264,10 @@
     "translation": "We encountered an error saving the audit"
   },
   {
+    "id": "store.sql_audit.permanent_delete_batch.app_error",
+    "translation": "We encountered an error permanently deleting the batch of audits"
+  },
+  {
     "id": "store.sql_channel.analytics_deleted_type_count.app_error",
     "translation": "We couldn't get deleted channel type counts"
   },
@@ -5624,6 +5628,10 @@
     "translation": "We couldn't save or update the file info"
   },
   {
+    "id": "store.sql_file_info.permanent_delete_batch.app_error",
+    "translation": "We encountered an error permanently deleting the batch of file infos"
+  },
+  {
     "id": "store.sql_job.delete.app_error",
     "translation": "We couldn't delete the job"
   },
@@ -5856,6 +5864,10 @@
     "translation": "We couldn't update the Post"
   },
   {
+    "id": "store.sql_post.permanent_delete_batch.app_error",
+    "translation": "We encountered an error permanently deleting the batch of posts"
+  },
+  {
     "id": "store.sql_preference.delete.app_error",
     "translation": "We encountered an error while deleting preferences"
   },
@@ -5956,6 +5968,10 @@
     "translation": "Unable to save reaction"
   },
   {
+    "id": "store.sql_reaction.permanent_delete_batch.app_error",
+    "translation": "We encountered an error permanently deleting the batch of reactions"
+  },
+  {
     "id": "store.sql_session.analytics_session_count.app_error",
     "translation": "We couldn't count the sessions"
   },
diff --git a/store/layered_store.go b/store/layered_store.go
index ac0713f57..0c6a01125 100644
--- a/store/layered_store.go
+++ b/store/layered_store.go
@@ -199,3 +199,9 @@ func (s *LayeredReactionStore) DeleteAllWithEmojiName(emojiName string) StoreCha
 		return supplier.ReactionDeleteAllWithEmojiName(s.TmpContext, emojiName)
 	})
 }
+
+func (s *LayeredReactionStore) PermanentDeleteBatch(endTime int64, limit int64) StoreChannel {
+	return s.RunQuery(func(supplier LayeredStoreSupplier) *LayeredStoreSupplierResult {
+		return supplier.ReactionPermanentDeleteBatch(s.TmpContext, endTime, limit)
+	})
+}
diff --git a/store/layered_store_supplier.go b/store/layered_store_supplier.go
index 35668c717..841b75a32 100644
--- a/store/layered_store_supplier.go
+++ b/store/layered_store_supplier.go
@@ -30,4 +30,5 @@ type LayeredStoreSupplier interface {
 	ReactionDelete(ctx context.Context, reaction *model.Reaction, hints ...LayeredStoreHint) *LayeredStoreSupplierResult
 	ReactionGetForPost(ctx context.Context, postId string, hints ...LayeredStoreHint) *LayeredStoreSupplierResult
 	ReactionDeleteAllWithEmojiName(ctx context.Context, emojiName string, hints ...LayeredStoreHint) *LayeredStoreSupplierResult
+	ReactionPermanentDeleteBatch(ctx context.Context, endTime int64, limit int64, hints ...LayeredStoreHint) *LayeredStoreSupplierResult
 }
diff --git a/store/local_cache_supplier_reactions.go b/store/local_cache_supplier_reactions.go
index a67cff2e4..be32ab77e 100644
--- a/store/local_cache_supplier_reactions.go
+++ b/store/local_cache_supplier_reactions.go
@@ -45,3 +45,9 @@ func (s *LocalCacheSupplier) ReactionDeleteAllWithEmojiName(ctx context.Context,
 	s.doClearCacheCluster(s.reactionCache)
 	return s.Next().ReactionDeleteAllWithEmojiName(ctx, emojiName, hints...)
 }
+
+func (s *LocalCacheSupplier) ReactionPermanentDeleteBatch(ctx context.Context, endTime int64, limit int64, hints ...LayeredStoreHint) *LayeredStoreSupplierResult {
+	// Don't bother to clear the cache as the posts will be gone anyway and the reactions being deleted will
+	// expire from the cache in due course.
+	return s.Next().ReactionPermanentDeleteBatch(ctx, endTime, limit)
+}
diff --git a/store/redis_supplier.go b/store/redis_supplier.go
index 195d2c496..167bafd6f 100644
--- a/store/redis_supplier.go
+++ b/store/redis_supplier.go
@@ -131,3 +131,8 @@ func (s *RedisSupplier) ReactionDeleteAllWithEmojiName(ctx context.Context, emoj
 	// Ignoring this. It's probably OK to have the emoji slowly expire from Redis.
 	return s.Next().ReactionDeleteAllWithEmojiName(ctx, emojiName, hints...)
 }
+
+func (s *RedisSupplier) ReactionPermanentDeleteBatch(ctx context.Context, endTime int64, limit int64, hints ...LayeredStoreHint) *LayeredStoreSupplierResult {
+	// Ignoring this. It's probably OK to have the emoji slowly expire from Redis.
+	return s.Next().ReactionPermanentDeleteBatch(ctx, endTime, limit, hints...)
+}
diff --git a/store/sql_audit_store.go b/store/sql_audit_store.go
index d1ba65be1..1eb4e4819 100644
--- a/store/sql_audit_store.go
+++ b/store/sql_audit_store.go
@@ -4,7 +4,10 @@
 package store
 
 import (
+	"net/http"
+
 	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/utils"
 )
 
 type SqlAuditStore struct {
@@ -109,3 +112,36 @@ func (s SqlAuditStore) PermanentDeleteByUser(userId string) StoreChannel {
 
 	return storeChannel
 }
+
+func (s SqlAuditStore) PermanentDeleteBatch(endTime int64, limit int64) StoreChannel {
+	storeChannel := make(StoreChannel, 1)
+
+	go func() {
+		result := StoreResult{}
+
+		var query string
+		if *utils.Cfg.SqlSettings.DriverName == "postgres" {
+			query = "DELETE from Audits WHERE Id = any (array (SELECT Id FROM Audits WHERE CreateAt < :EndTime LIMIT :Limit))"
+		} else {
+			query = "DELETE from Audits WHERE CreateAt < :EndTime LIMIT :Limit"
+		}
+
+		sqlResult, err := s.GetMaster().Exec(query, map[string]interface{}{"EndTime": endTime, "Limit": limit})
+		if err != nil {
+			result.Err = model.NewAppError("SqlAuditStore.PermanentDeleteBatch", "store.sql_audit.permanent_delete_batch.app_error", nil, ""+err.Error(), http.StatusInternalServerError)
+		} else {
+			rowsAffected, err1 := sqlResult.RowsAffected()
+			if err1 != nil {
+				result.Err = model.NewAppError("SqlAuditStore.PermanentDeleteBatch", "store.sql_audit.permanent_delete_batch.app_error", nil, ""+err.Error(), http.StatusInternalServerError)
+				result.Data = int64(0)
+			} else {
+				result.Data = rowsAffected
+			}
+		}
+
+		storeChannel <- result
+		close(storeChannel)
+	}()
+
+	return storeChannel
+}
diff --git a/store/sql_audit_store_test.go b/store/sql_audit_store_test.go
index 2e83bf563..8db5b5506 100644
--- a/store/sql_audit_store_test.go
+++ b/store/sql_audit_store_test.go
@@ -58,3 +58,32 @@ func TestSqlAuditStore(t *testing.T) {
 		t.Fatal(r2.Err)
 	}
 }
+
+func TestAuditStorePermanentDeleteBatch(t *testing.T) {
+	Setup()
+
+	a1 := &model.Audit{UserId: model.NewId(), IpAddress: "ipaddress", Action: "Action"}
+	Must(store.Audit().Save(a1))
+	time.Sleep(10 * time.Millisecond)
+	a2 := &model.Audit{UserId: a1.UserId, IpAddress: "ipaddress", Action: "Action"}
+	Must(store.Audit().Save(a2))
+	time.Sleep(10 * time.Millisecond)
+	cutoff := model.GetMillis()
+	time.Sleep(10 * time.Millisecond)
+	a3 := &model.Audit{UserId: a1.UserId, IpAddress: "ipaddress", Action: "Action"}
+	Must(store.Audit().Save(a3))
+
+	if r := <-store.Audit().Get(a1.UserId, 0, 100); len(r.Data.(model.Audits)) != 3 {
+		t.Fatal("Expected 3 audits. Got ", len(r.Data.(model.Audits)))
+	}
+
+	Must(store.Audit().PermanentDeleteBatch(cutoff, 1000000))
+
+	if r := <-store.Audit().Get(a1.UserId, 0, 100); len(r.Data.(model.Audits)) != 1 {
+		t.Fatal("Expected 1 audit. Got ", len(r.Data.(model.Audits)))
+	}
+
+	if r2 := <-store.Audit().PermanentDeleteByUser(a1.UserId); r2.Err != nil {
+		t.Fatal(r2.Err)
+	}
+}
diff --git a/store/sql_file_info_store.go b/store/sql_file_info_store.go
index eab83992f..4cd574b13 100644
--- a/store/sql_file_info_store.go
+++ b/store/sql_file_info_store.go
@@ -281,3 +281,36 @@ func (fs SqlFileInfoStore) PermanentDelete(fileId string) StoreChannel {
 
 	return storeChannel
 }
+
+func (s SqlFileInfoStore) PermanentDeleteBatch(endTime int64, limit int64) StoreChannel {
+	storeChannel := make(StoreChannel, 1)
+
+	go func() {
+		result := StoreResult{}
+
+		var query string
+		if *utils.Cfg.SqlSettings.DriverName == "postgres" {
+			query = "DELETE from FileInfo WHERE Id = any (array (SELECT Id FROM FileInfo WHERE CreateAt < :EndTime LIMIT :Limit))"
+		} else {
+			query = "DELETE from FileInfo WHERE CreateAt < :EndTime LIMIT :Limit"
+		}
+
+		sqlResult, err := s.GetMaster().Exec(query, map[string]interface{}{"EndTime": endTime, "Limit": limit})
+		if err != nil {
+			result.Err = model.NewAppError("SqlFileInfoStore.PermanentDeleteBatch", "store.sql_file_info.permanent_delete_batch.app_error", nil, ""+err.Error(), http.StatusInternalServerError)
+		} else {
+			rowsAffected, err1 := sqlResult.RowsAffected()
+			if err1 != nil {
+				result.Err = model.NewAppError("SqlFileInfoStore.PermanentDeleteBatch", "store.sql_file_info.permanent_delete_batch.app_error", nil, ""+err.Error(), http.StatusInternalServerError)
+				result.Data = int64(0)
+			} else {
+				result.Data = rowsAffected
+			}
+		}
+
+		storeChannel <- result
+		close(storeChannel)
+	}()
+
+	return storeChannel
+}
diff --git a/store/sql_file_info_store_test.go b/store/sql_file_info_store_test.go
index b62083136..c08bed7d4 100644
--- a/store/sql_file_info_store_test.go
+++ b/store/sql_file_info_store_test.go
@@ -256,3 +256,44 @@ func TestFileInfoPermanentDelete(t *testing.T) {
 		t.Fatal(result.Err)
 	}
 }
+
+func TestFileInfoPermanentDeleteBatch(t *testing.T) {
+	Setup()
+
+	postId := model.NewId()
+
+	Must(store.FileInfo().Save(&model.FileInfo{
+		PostId:    postId,
+		CreatorId: model.NewId(),
+		Path:      "file.txt",
+		CreateAt: 1000,
+	}))
+
+	Must(store.FileInfo().Save(&model.FileInfo{
+		PostId:    postId,
+		CreatorId: model.NewId(),
+		Path:      "file.txt",
+		CreateAt: 1200,
+	}))
+
+	Must(store.FileInfo().Save(&model.FileInfo{
+		PostId:    postId,
+		CreatorId: model.NewId(),
+		Path:      "file.txt",
+		CreateAt: 2000,
+	}))
+
+	if result := <-store.FileInfo().GetForPost(postId, true, false); result.Err != nil {
+		t.Fatal(result.Err)
+	} else if len(result.Data.([]*model.FileInfo)) != 3 {
+		t.Fatal("Expected 3 fileInfos")
+	}
+
+	Must(store.FileInfo().PermanentDeleteBatch(1500, 1000))
+
+	if result := <-store.FileInfo().GetForPost(postId, true, false); result.Err != nil {
+		t.Fatal(result.Err)
+	} else if len(result.Data.([]*model.FileInfo)) != 1 {
+		t.Fatal("Expected 3 fileInfos")
+	}
+}
diff --git a/store/sql_post_store.go b/store/sql_post_store.go
index 2aa862218..b300f9a59 100644
--- a/store/sql_post_store.go
+++ b/store/sql_post_store.go
@@ -1356,3 +1356,36 @@ func (s SqlPostStore) GetPostsBatchForIndexing(startTime int64, limit int) Store
 
 	return storeChannel
 }
+
+func (s SqlPostStore) PermanentDeleteBatch(endTime int64, limit int64) StoreChannel {
+	storeChannel := make(StoreChannel, 1)
+
+	go func() {
+		result := StoreResult{}
+
+		var query string
+		if *utils.Cfg.SqlSettings.DriverName == "postgres" {
+			query = "DELETE from Posts WHERE Id = any (array (SELECT Id FROM Posts WHERE CreateAt < :EndTime LIMIT :Limit))"
+		} else {
+			query = "DELETE from Posts WHERE CreateAt < :EndTime LIMIT :Limit"
+		}
+
+		sqlResult, err := s.GetMaster().Exec(query, map[string]interface{}{"EndTime": endTime, "Limit": limit})
+		if err != nil {
+			result.Err = model.NewAppError("SqlPostStore.PermanentDeleteBatch", "store.sql_post.permanent_delete_batch.app_error", nil, ""+err.Error(), http.StatusInternalServerError)
+		} else {
+			rowsAffected, err1 := sqlResult.RowsAffected()
+			if err1 != nil {
+				result.Err = model.NewAppError("SqlPostStore.PermanentDeleteBatch", "store.sql_post.permanent_delete_batch.app_error", nil, ""+err.Error(), http.StatusInternalServerError)
+				result.Data = int64(0)
+			} else {
+				result.Data = rowsAffected
+			}
+		}
+
+		storeChannel <- result
+		close(storeChannel)
+	}()
+
+	return storeChannel
+}
diff --git a/store/sql_post_store_test.go b/store/sql_post_store_test.go
index 79892b5f5..304fb9f8a 100644
--- a/store/sql_post_store_test.go
+++ b/store/sql_post_store_test.go
@@ -1661,3 +1661,42 @@ func TestPostStoreGetPostsBatchForIndexing(t *testing.T) {
 		}
 	}
 }
+
+func TestPostStorePermanentDeleteBatch(t *testing.T) {
+	Setup()
+
+	o1 := &model.Post{}
+	o1.ChannelId = model.NewId()
+	o1.UserId = model.NewId()
+	o1.Message = "zz" + model.NewId() + "AAAAAAAAAAA"
+	o1.CreateAt = 1000
+	o1 = (<-store.Post().Save(o1)).Data.(*model.Post)
+
+	o2 := &model.Post{}
+	o2.ChannelId = model.NewId()
+	o2.UserId = model.NewId()
+	o2.Message = "zz" + model.NewId() + "AAAAAAAAAAA"
+	o2.CreateAt = 1000
+	o2 = (<-store.Post().Save(o2)).Data.(*model.Post)
+
+	o3 := &model.Post{}
+	o3.ChannelId = model.NewId()
+	o3.UserId = model.NewId()
+	o3.Message = "zz" + model.NewId() + "AAAAAAAAAAA"
+	o3.CreateAt = 100000
+	o3 = (<-store.Post().Save(o3)).Data.(*model.Post)
+
+	Must(store.Post().PermanentDeleteBatch(2000, 1000))
+
+	if p := <-store.Post().Get(o1.Id); p.Err == nil {
+		t.Fatalf("Should have not found post 1 after purge")
+	}
+
+	if p := <-store.Post().Get(o2.Id); p.Err == nil {
+		t.Fatalf("Should have not found post 2 after purge")
+	}
+
+	if p := <-store.Post().Get(o3.Id); p.Err != nil {
+		t.Fatalf("Should have found post 3 after purge")
+	}
+}
diff --git a/store/sql_reaction_store_test.go b/store/sql_reaction_store_test.go
index ac2590ea4..ebc09dc9b 100644
--- a/store/sql_reaction_store_test.go
+++ b/store/sql_reaction_store_test.go
@@ -294,3 +294,58 @@ func TestReactionDeleteAllWithEmojiName(t *testing.T) {
 		t.Fatal("post shouldn't have reactions any more")
 	}
 }
+
+func TestReactionStorePermanentDeleteBatch(t *testing.T) {
+	Setup()
+
+	post := Must(store.Post().Save(&model.Post{
+		ChannelId: model.NewId(),
+		UserId:    model.NewId(),
+	})).(*model.Post)
+
+	reactions := []*model.Reaction{
+		{
+			UserId:    model.NewId(),
+			PostId:    post.Id,
+			EmojiName: "sad",
+			CreateAt:  1000,
+		},
+		{
+			UserId:    model.NewId(),
+			PostId:    post.Id,
+			EmojiName: "sad",
+			CreateAt:  1500,
+		},
+		{
+			UserId:    model.NewId(),
+			PostId:    post.Id,
+			EmojiName: "sad",
+			CreateAt:  2000,
+		},
+		{
+			UserId:    model.NewId(),
+			PostId:    post.Id,
+			EmojiName: "sad",
+			CreateAt:  2000,
+		},
+	}
+
+	// Need to hang on to a reaction to delete later in order to clear the cache, as "allowFromCache" isn't honoured any more.
+	var lastReaction *model.Reaction
+	for _, reaction := range reactions {
+		lastReaction = Must(store.Reaction().Save(reaction)).(*model.Reaction)
+	}
+
+	if returned := Must(store.Reaction().GetForPost(post.Id, false)).([]*model.Reaction); len(returned) != 4 {
+		t.Fatal("expected 4 reactions")
+	}
+
+	Must(store.Reaction().PermanentDeleteBatch(1800, 1000))
+
+	// This is to force a clear of the cache.
+	Must(store.Reaction().Delete(lastReaction))
+
+	if returned := Must(store.Reaction().GetForPost(post.Id, false)).([]*model.Reaction); len(returned) != 1 {
+		t.Fatalf("expected 1 reaction. Got: %v", len(returned))
+	}
+}
diff --git a/store/sql_supplier_reactions.go b/store/sql_supplier_reactions.go
index 2293a2f88..94a980455 100644
--- a/store/sql_supplier_reactions.go
+++ b/store/sql_supplier_reactions.go
@@ -5,8 +5,10 @@ package store
 
 import (
 	"context"
+	"net/http"
 
 	l4g "github.com/alecthomas/log4go"
+
 	"github.com/mattermost/gorp"
 	"github.com/mattermost/mattermost-server/model"
 	"github.com/mattermost/mattermost-server/utils"
@@ -140,6 +142,32 @@ func (s *SqlSupplier) ReactionDeleteAllWithEmojiName(ctx context.Context, emojiN
 	return result
 }
 
+func (s *SqlSupplier) ReactionPermanentDeleteBatch(ctx context.Context, endTime int64, limit int64, hints ...LayeredStoreHint) *LayeredStoreSupplierResult {
+	result := NewSupplierResult()
+
+	var query string
+	if *utils.Cfg.SqlSettings.DriverName == "postgres" {
+		query = "DELETE from Reactions WHERE Id = any (array (SELECT Id FROM Reactions WHERE CreateAt < :EndTime LIMIT :Limit))"
+	} else {
+		query = "DELETE from Reactions WHERE CreateAt < :EndTime LIMIT :Limit"
+	}
+
+	sqlResult, err := s.GetMaster().Exec(query, map[string]interface{}{"EndTime": endTime, "Limit": limit})
+	if err != nil {
+		result.Err = model.NewAppError("SqlReactionStore.PermanentDeleteBatch", "store.sql_reaction.permanent_delete_batch.app_error", nil, ""+err.Error(), http.StatusInternalServerError)
+	} else {
+		rowsAffected, err1 := sqlResult.RowsAffected()
+		if err1 != nil {
+			result.Err = model.NewAppError("SqlReactionStore.PermanentDeleteBatch", "store.sql_reaction.permanent_delete_batch.app_error", nil, ""+err.Error(), http.StatusInternalServerError)
+			result.Data = int64(0)
+		} else {
+			result.Data = rowsAffected
+		}
+	}
+
+	return result
+}
+
 func saveReactionAndUpdatePost(transaction *gorp.Transaction, reaction *model.Reaction) error {
 	if err := transaction.Insert(reaction); err != nil {
 		return err
diff --git a/store/store.go b/store/store.go
index 49d395432..f7962fa4f 100644
--- a/store/store.go
+++ b/store/store.go
@@ -171,6 +171,7 @@ type PostStore interface {
 	Overwrite(post *model.Post) StoreChannel
 	GetPostsByIds(postIds []string) StoreChannel
 	GetPostsBatchForIndexing(startTime int64, limit int) StoreChannel
+	PermanentDeleteBatch(endTime int64, limit int64) StoreChannel
 }
 
 type UserStore interface {
@@ -242,6 +243,7 @@ type AuditStore interface {
 	Save(audit *model.Audit) StoreChannel
 	Get(user_id string, offset int, limit int) StoreChannel
 	PermanentDeleteByUser(userId string) StoreChannel
+	PermanentDeleteBatch(endTime int64, limit int64) StoreChannel
 }
 
 type ClusterDiscoveryStore interface {
@@ -387,6 +389,7 @@ type FileInfoStore interface {
 	AttachToPost(fileId string, postId string) StoreChannel
 	DeleteForPost(postId string) StoreChannel
 	PermanentDelete(fileId string) StoreChannel
+	PermanentDeleteBatch(endTime int64, limit int64) StoreChannel
 }
 
 type ReactionStore interface {
@@ -394,6 +397,7 @@ type ReactionStore interface {
 	Delete(reaction *model.Reaction) StoreChannel
 	GetForPost(postId string, allowFromCache bool) StoreChannel
 	DeleteAllWithEmojiName(emojiName string) StoreChannel
+	PermanentDeleteBatch(endTime int64, limit int64) StoreChannel
 }
 
 type JobStore interface {